Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018	Oct. 01, 2019
Accounting Policies [Abstract]
Goodwill impairment expense	$ 6,976	$ 6,976	$ 0	$ 0
Deferred financing cost amortization		152	318	288
Debt Issuance Costs, Noncurrent, Net	736	736	782
Accounts Receivable, Allowance for Credit Loss	(2,613)	(2,613)	(1,184)	(868)
Deferred tax assets	$ 33,803	33,803	40,874
Loss Contingency, Undiscounted Amount of Insurance-related Assessment Liability		3,886	$ 4,975
Accrual for Loss Contingencies, Undiscounted, First Year		1,195
Accrual for Loss Contingencies, Undiscounted, Second Year		839
Accrual for Loss Contingencies, Undiscounted, Third Year		538
Accrual for Loss Contingencies, Undiscounted, Fourth Year		347
Accrual for Loss Contingencies, Undiscounted, Fifth Year		217
Accrual for Insurance Loss Contingencies, Undiscounted, after Fifth Year		$ 750
Loss Contingency Accrual, Insurance-related Assessment, Discount Rate	0.30%	0.30%	1.60%
Accrued Insurance, Current	$ 3,832	$ 3,832	$ 4,702
Liability for Claims and Claims Adjustment Expense, Disability, Accident and Health	2,422	2,422	1,981
Letters of Credit Outstanding, Amount	5,664	5,664
Redeemable Noncontrolling Interest, Equity, Redemption Value	1,582	1,582
Noncontrolling Interest, Change in Redemption Value		(194)		$ 44
Operating right of use assets	31,786	31,786	$ 0		$ 32,434
Operating Lease, Liability	$ 31,586	$ 31,586			$ 32,237